<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>首页</title>
    <style>
    body{
        background: transparent url('/static/img/A.PNG');
        background-size: 100% ;
        background-attachment: local;
    }
    table{
        text-align: center;
        margin: auto;
        width: 500px;
        height: 90px;
    }
    </style>
</head>
<body>
    <div >
        <table  >
        </table>

    </div>
        <div ID="add_register"  style="position: absolute;top: 30%;left: 30%;text-align: center;border: 1px solid black; " >
    <div class="rg_layout">
        <div class="rg_center" style="background-color: rgba(95,158,155,0.1)">

    <script>
        function DB_add_duan() {
            document.getElementById('add_duan').style.display=block
        }
    </script>
</body>
</html>